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Expired European patentEurope

Method for stabilising crude oils at the outlet of a well, and device therefor

EP 0662997 B1 · Applicant: ELF AQUITAINE PRODUCTION

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Listed from its EPO record in Patent Yard's archive of European patents past their term. Its claims, description and drawings are in the EPO PDF and on Google Patents, and the Claude kit works from them.

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Why it's free to use

  • Filed July 28, 1994 and granted December 23, 1998. A European patent lasts at most 20 years from filing, so its term ended July 28, 2014.
  • A supplementary protection certificate, which can extend a medicine or crop-protection patent, adds at most five and a half years, so even that would have ended by January 28, 2020.
  • We check European rights only. A US or other national patent in its family could still be in force: check its family on Espacenet or Google Patents.
FiledJuly 28, 1994
PublishedJuly 19, 1995
GrantedDecember 23, 1998
Term endedJuly 28, 2014
Application numberEP 94923753
Classification (CPC)C10G7/02 +1 more

Timeline

Timeline From EPO dates

1995199719992001200320052007200920112013Application filedJuly 28, 1994PublishedJuly 19, 1995Patent grantedDec 23, 1998Term endedJuly 28, 2014

Sources & verification

Official EPO records

Full published documentClaims, description and drawings as a PDF.EPOEuropean Patent RegisterProcedure, status, file inspection and legal events.EPOLinked open EP data recordThe bibliographic record this page is built from.EPO

Cross-check elsewhere

Google PatentsFull text, worldwide family, citing patents and legal events.patents.google.comEspacenetNational family members and their legal status.European Patent Office

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